swiftech is the only one to offer quick-connects, in fact it comes with no barbs or quick connects, they are all optional. This would allow listing it for a dollar or two cheaper and letting people use their own barbs or purchasing a mix of barb sizes. Say 3/8OD barbs for the inlet and 1/2OD for the outlet to better balance flow resistance when combining loops or using different tubing sizes like swiftech does with the pump fittings vs. the other components.
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